JPH119032A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter for preventing the upward movement of the front part of a float followed by shallowness of seedling transplanting depth, by installing a control apparatus for making seedling transplanting depth deep based on plural factors except height variability of a seedling transplanting apparatus above a field face position. SOLUTION: In this seedling transplanter constituted to control the height of a seedling transplanting apparatus above a field face position by lifting and lowering the seedling transplanting apparatus based on the vertical motion of the front part of a float grounding and sliding on the face of a field, the seedling transplanter is equipped with a control apparatus for making seedling transplanting depth deep based on plural factors which are factors to move the front part of the float upward such as measurement factors by a water depth sensor 33, a hardness and softness sensor 34 and a speed sensor 36 except height variability of the seedling transplanting apparatus above a field face position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling transplanter configured to control the raising and lowering of a seedling plant.

[0002]

2. Description of the Related Art Conventionally, a seedling plant is moved up and down based on a vertical movement of a front part of a float which slides on a field scene, and a height of the seedling device with respect to a field scene position is maintained at a set height. Some of the seedling transplanters configured to perform such control include a control device for controlling the seedling depth to be increased based on an increase in the forward speed of the body.

[0003]

The above prior art is
The structure is such that the seedling planting depth is controlled to be deep based on one factor other than the height variation of the seedling plant with respect to the field scene position, which is a factor for moving the front of the float upward. With respect to the factor (running speed in the above case), problems such as falling of the planted seedling due to the shallow planting depth can be prevented. However, field conditions and work environments are diverse, and there has been a situation in which the above problem cannot be reliably prevented by only the above-mentioned one factor. Therefore, an object of the present invention is to prevent the above-described problem in response to various field conditions and work environments.

[0004]

In order to solve the above-mentioned problems, the present invention raises and lowers the seedling-planting device 10 based on the vertical movement of the front portion of a float 14 which slides on a field scene. In the seedling transplanter configured to control the height of the seedling transplanter 10 with respect to the position to be maintained at a set height,
A control device for controlling the seedling planting depth to be increased based on a plurality of factors other than the height variation of the seedling planting device 10 with respect to the field scene position, which is a factor for moving the front part of the seed 14 upward. It is a seedling plant characterized by the following.

[0005]

The seedling transplanter increases the seedling depth based on a plurality of factors that cause the front portion of the float 14 to move upwards and other than the variation of the field scene position with respect to the seedling transplanter 10. Take control.

[0006]

According to the present invention, the seedling plant 10 is raised and lowered based on the vertical movement of the front part of the float 14 which slides on the field scene, and the height of the seedling plant 10 with respect to the field scene position is set to the set height. In the seedling transplanter configured to be controlled so as to be maintained at the same position, a plurality of factors other than the height change of the seedling transplanter 10 with respect to the field scene position, which cause the front portion of the float 14 to move upward. A control device is provided for controlling the seedling planting depth based on the seedling planting depth. Can be prevented in accordance with various field conditions and working environments.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A riding type seedling plant according to one embodiment of the present invention will be described in detail below. 1 and 2, a vehicle body 1 has front wheels 3 steerable by a steering handle 2 and rear wheels 5 behind a cockpit 4 mounted on axles 6 and 7. A four-wheel drive type in which the power of the mounted engine 8 is transmitted and driven, and a non-grounded tilt sensor 9 in the form of a pendulum that can swing back and forth or left and right is provided below the abdomen.

A seedling planting apparatus 10 includes a seedling plant body 11 for storing and feeding seedlings in a seedling plant body 11, a seedling planting apparatus 13 for separating and inserting the seedlings fed from the seedling tank 12, and these seedlings. It has a float 14 and the like for supporting the planting machine 11 and the like while sliding on the soil surface and leveling it. The seedling planting machine 11 is moved up and down via a lifting link 15 comprising a parallel link mechanism with respect to the rear of the vehicle body 1. It is configured to be freely connected, and to be moved up and down by expansion and contraction of the elevating cylinder 16 by the hydraulic pressure at the rear of the vehicle body 1.

The fertilizer application device 17 is provided on the rear portion of the vehicle body 1.
And a flexible fertilization pipe 18 is used to look over a groove generator 19 provided on the float 14 of the seedling planting apparatus 10, and a blower 20 is rotated by transmitting the power of the engine 8. ,
The fertilizer supplied from the fertilizer 17 is sprayed into a groove formed on the surface of the seedling-planted soil to perform fertilization. Body 1
A hydraulic circuit 22 for extending and retracting the piston 21 of the elevating cylinder 16 by the hydraulic pump P is provided at the rear part, and an elevating control valve 23 and an oil drain valve 24 are provided in the hydraulic circuit 22. The elevating control valve 23 is operably provided by an operating lever 25. The elevating cylinder 16 is extended when the elevation angle of the float 14 is increased by the vertical rotation about the float shaft 26 at the front of the float 14. When the elevation angle of the float 14 becomes small, the raising / lowering cylinder 16 is contracted to lower the seedling plant 10 so that the seedling plant 10 is lowered.
4 so as to keep the contact pressure of the soil surface almost constant, and to keep the seedling planting depth constant.

When the vehicle body 1 is in a horizontal position, the oil drain valve 24 is in a neutral position by the inclination sensor 9 and closes a hydraulic circuit from the lifting cylinder 16 to the tank port T.
When the vehicle body 1 is tilted in the front-rear direction or the left-right direction, the tilt sensor 9 swings back and forth with respect to the vehicle body 1 or swings left and right to move the oil drain valve 24 from the neutral position to the oil draining position communicating with the tank port T. By switching, regardless of the switching control of the raising / lowering control valve 23, the oil in the raising / lowering cylinder 16 is drained by the weight of the seedling transplanter 10, the piston 21 is pushed back, and the seedling transplanter 10 descends. The lowering of the seedling plant 10 by the oil drain valve 24 causes the oil drain valve 24 to switch to the neutral position when the vehicle body 1 returns to the horizontal state, and the float 14 to reach the vicinity of the ground contact surface. Stop.

Therefore, when loading / unloading a truck, entering / leaving a field, or crossing a ridge, if the aircraft body is tilted more than a certain level with the seedling plant 10 raised, the tilt sensor 9 detects the inclination, switches the drain valve 24 to the tank port T, releases the hydraulic pressure of the lifting cylinder 16 to the tank port T, retracts the piston 21, and lowers the seedling plant 10. . As a result, the position of the center of gravity of the entire body is lowered, and it is difficult for the body to fall down, so that the vehicle can travel safely.

1 and 4, the elevation control valve 23 is provided between an attachment member 27 projecting forward of the seedling plant 11 and a front portion of the float 14. As shown in FIG. 28 is an enlargement / reduction link. A float shaft 26 for supporting the rear portion of the float 14 is provided at the rear end of an adjustment arm 30 pivotally supported 29 so as to be vertically rotatable with respect to the seedling plant 11. The worm 30 is vertically rotated around the pivot 29 by a servo motor 31 to change and adjust the contact height of the float 14, that is, the seedling depth with respect to the soil surface by the seedling plant 13. It has a configuration.

The controller 32 for driving the servo motor 31 has a microcomputer CPU.
The motor 31 is controlled to rotate forward or reverse by detection by the following sensor to move the float shaft 26 of the float 14 up and down. This sensor detects the water depth of the running soil surface, and adjusts the depth of the control arm 30 so that the plant is deeply planted when the water is detected.
The water depth sensor 33, which detects the hardness of the soil,
When detecting hard soil, a hard / soft sensor 34 for controlling deep planting, a facing angle (elevation angle) of the float 14 is detected, and when the facing angle is large, a float angle sensor 35 for controlling deep planting, a vehicle speed, When the transmission rotation speed of the seedling planting device 13 is detected, and when the speed is high, the vehicle speed sensor 36 to the planting speed sensor that controls deep planting and the seedling height in the seedling tank 12 are detected, and when the seedling height is high. Is a seedling length sensor 37 for controlling deep planting, and a wind sensor 3 for detecting wind force during seedling planting operation and controlling deep planting when the wind is strong.
8. A contaminant sensor 39, a seedling plant 10 that detects contaminants such as straw debris in the soil and controls the deep planting when there are many contaminants.
The degree and magnitude of the rolling control for the lifting link 15 are detected, and when the rolling is large or large, the rolling sensor 40 and the float 1 are controlled to be deeply planted.
4 and the pitching control by the elevation control valve 23 and the like, the degree and magnitude of the pitching control are detected.
The horizontal sensor 42 for controlling the deep planting when the front-down slope is large, or the seedling collection from the seedling tank 12 by the seedling planting device 13 is detected when the front-down slope is large. When the number is small, a seedling quantity sensor 43 or the like for controlling deep planting is provided, and the motor 31 is driven and controlled based on detection by one or a plurality of these sensors. In this case, the horizontal sensor 42 may be based on the inclination sensor 9.

Therefore, the above-mentioned configuration is based on the above-mentioned plurality of factors, which are factors that cause the front part of the float 14 to move upward and are factors other than the height variation of the seedling plant 10 relative to the field scene position. A control device for controlling the seedling planting depth to be deeper based on the height of the seedling planting device relative to the field scene position. The problem that the planting depth becomes shallow due to the movement and the planted seedling falls down can be prevented in accordance with various field conditions and working environments.

In FIG. 3, the hydraulic circuit 22 includes:
A throttle valve 44 for switching and controlling the amount of oil drained from the lifting cylinder 16 is provided in conjunction with a wire 45 by the up and down movement of the float 14, and the raising and lowering control is performed from the position where the seedling plant 10 is raised to the non-working position. When the valve 14 is lowered by the switching of the valve 23, the throttle valve 44 is fully open and descends at a high speed in a state of drooping under the weight of the float 14, but the float 14 comes in contact with the ground. When drooping becomes small, throttle valve 4
4 is squeezed to restrict the amount of oil drained to the tank port T to reduce the descending speed of the seedling plant 10 so that no impact is given to the seedling plant 10. The throttle valve 44 may be in the form of a variable throttle.

In the process of lowering the seedling plant 10 by operating a raising / lowering control valve 23 provided in a hydraulic circuit of the raising / lowering cylinder 16, the seedling plant 11 of the float 14 is controlled.
The lowering speed is controlled by the vertical position and the opening relative to the vehicle. The seedling is a walking type in which the vehicle body and the seedling transplanter are integrally formed, and the raising and lowering of the seedling plant is controlled while changing the relative vertical position with respect to the wheels. It can also be applied to machines.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling planter.

FIG. 2 is a hydraulic circuit diagram of a seedling planter.

FIG. 3 is a hydraulic circuit diagram of another configuration of the seedling transplanter.

FIG. 4 is a control block diagram.

[Explanation of symbols]

 10: Seedling plant 14: Float 31: Servo motor 31 32: Controller CPU: Microcomputer 33: Water depth sensor 34: Hard / soft sensor 35: Float angle sensor 36: Vehicle speed sensor 37: Seedling length sensor 38: Wind sensor 39: Sandwich sensor 40: Rolling sensor 41: Pitching sensor 42: Horizontal sensor 43: Seedling amount sensor

Claims (1)

[Claims] 1. A seedling plant 10 is moved up and down based on the vertical movement of a front part of a float 14 which slides on a field scene, and the height of the seedling plant 10 with respect to the field scene position is maintained at a set height. In the seedling transplanter configured to perform the above-described control, the seedling is planted based on a plurality of factors other than the height fluctuation of the seedling transplanter 10 with respect to the field scene position, which factor causes the front portion of the float 14 to move upward. A seedling plant comprising a control device for controlling the depth of attachment.